| Project/Area Number |
15540432
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Geology
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| Research Institution | Niigata University |
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Principal Investigator |
URABE Atsushi Niigata University, Research Institute for Hazards in Snowy Area, Associate Professor, 積雪地域災害研究センター, 助教授 (20281173)
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| Co-Investigator(Kenkyū-buntansha) |
TAKAHAMA Nobuyuki Niigata University, Research Institute for Hazards in Snowy Area, Professor, 積雪地域災害研究センター, 教授 (20018948)
TATEISHI Masaaki Niigata University, Faculty of Sciences, Professor, 理学部, 教授 (00126426)
KURITA Yuji Niigata University, Faculty of Sciences, Associate Professor, 理学部, 助教授 (60334645)
HOYANAGI Kouichi Shinsyu University, Faculty of Sciences, Associate Professor, 理学部, 助教授 (30202302)
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| Project Period (FY) |
2003 – 2004
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| Project Status |
Completed (Fiscal Year 2004)
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| Budget Amount *help |
¥3,700,000 (Direct Cost: ¥3,700,000)
Fiscal Year 2004: ¥1,400,000 (Direct Cost: ¥1,400,000)
Fiscal Year 2003: ¥2,300,000 (Direct Cost: ¥2,300,000)
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| Keywords | Niigata Plain / Alluvium / Facies Analysis / Depositional System / Relative Sea-level change / subsiding / 相対的海水準変動 / 相対的海水凖変動 / 平野の堆積システム |
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| Research Abstract |
The Niigata plain records the eustatic sea-level change and intermittent sedimentation by earthquake. The two boreholes are drilled in the lagoon, and depositional facies analysis, microfossil analysis and total sulfur quantity analysis, etc. was examined. As this result, there was 3 times of the marine transgression after Jomon transgression, and it became clear to change to the inland into the brackish water environment. This change is also recorded for the change of depositional facies of the barrier system. It became clear that the rapid subsiding was generating the regression of the system from the viewpoint of the transition of the barrier system. It is considered that it is based on the active concealed fault, which subdues such rapid sedimentation.
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